Probably:
Thompson, George, Private, 417250, 2nd/1st North Midland Field Ambulance, Royal Army Medical Corps
Born St. Luke's, Derby
Enlisted Derby
Killed in action 21st March 1918 aged 23
Commemorated on the Arras Memorial

1911 Census
A boilerworks rivet shop holder up
Son of George, a firewood dealer, and Emma Thompson, of 2, Charles Street, Derby

A bit of a mystery, as there is no G. H. Thompson listed in the Midland railway memorial book.

Derby (St. Alkmund's Church)
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Derby (St. Mary's Goods Yard)
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